Popov Oleksii, Vishnyakov Vladimir, Fleming Leigh, Podgurskiy Maxim, Blunt Liam
Metal Physics Department, Taras Shevchenko National University of Kyiv, Kyiv 01033, Ukraine.
Science and Research Center "Synthesis", Kyiv 02161, Ukraine.
ACS Omega. 2022 Jan 7;7(2):2205-2209. doi: 10.1021/acsomega.1c05749. eCollection 2022 Jan 18.
Biocompatible AlO-hBN ceramic was sintered from AlN and BO precursors by reaction hot pressing at 1750 °C and 30 MPa for 8 min. The ceramic was compared to nonreactive (NR) one sintered from AlO and BN under the same sintering conditions. The NR ceramic possesses 9% porosity as opposed to only 2% porosity for the reaction sintered AlO-hBN. The reaction sintered ceramic has crack resistance in the region of 5.0 ± 0.1 MPa·m, which is approximately 20% higher than previously reported pure AlO or AlO-hBN sintered without reaction support. The higher amount of hBN in the developed AlO-hBN material (27 vol %) facilitates hardness lowering to the region of 6 GPa, which is closer to the bone hardness and makes the ceramic machinable. Reaction sintering of the AlO-hBN composite opens a new area of creation and formation of load-bearing AlO-hBN ceramic bioimplants.
生物相容性AlO-hBN陶瓷由AlN和BO前驱体通过在1750°C和30 MPa下反应热压8分钟烧结而成。将该陶瓷与在相同烧结条件下由AlO和BN烧结而成的非反应性（NR）陶瓷进行比较。NR陶瓷的孔隙率为9%，而反应烧结的AlO-hBN陶瓷的孔隙率仅为2%。反应烧结陶瓷的抗裂性在5.0±0.1 MPa·m范围内，比先前报道的无反应支持烧结的纯AlO或AlO-hBN高出约20%。在开发的AlO-hBN材料中较高含量的hBN（27体积%）有助于将硬度降低到6 GPa的范围，这更接近骨硬度并使陶瓷可加工。AlO-hBN复合材料的反应烧结开辟了一种新型承重AlO-hBN陶瓷生物植入物的创造和形成领域。
